package com.gulimall.cart.controller;

import com.gulimall.cart.service.CartService;
import com.gulimall.cart.vo.Cart;
import com.gulimall.cart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;

@Controller
public class CartController {
    @Autowired
    private CartService cartService;

    /**
     * 获取当前用户购物车数据
     * @return
     */
    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItems() {
        List<CartItem> cartItems = cartService.getCurrentUserCartItems();
        return cartItems;
    }

    /**
     * 删除商品
     * @param skuId
     * @return
     */
    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 修改item数量
     * @param skuId
     * @param num
     * @return
     */
    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num) {
        cartService.countItem(skuId, num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 勾选购物项
     * @param skuId
     * @param checked
     * @return
     */
    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId, @RequestParam("checked") Integer checked) {
        cartService.checkItem(skuId, checked);
        return "redirect:http://cart.gulimall.com/cart.html";
    }


    /**
     * 浏览器有一个cookie: user-key: 标识用户身份,一个月后过期
     * 如果第一次使用购物车功能，都会给一个临时的用户身份
     * 浏览器以后保存，每次访问都会带上这个cookie
     * <p>
     * 登录：session有
     * 没登录：按照cookie里面带来user-key来做
     * 第一次：如果没有临时用户，创建一个临时用户
     * @return
     */

    @GetMapping("/cart.html")
    public String catListPage(Model model) {
        //根据获取当前线程userinfo
        Cart cart = cartService.getCart();
        model.addAttribute("cart", cart);
        return "cartList";
    }

    @GetMapping("/addCartItem")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes redirectAttributes) {
        cartService.addToCart(skuId, num);
        redirectAttributes.addAttribute("skuId", skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {
        //重定向到成功页面  再次查询购物车数据即可
        CartItem item = cartService.getCartItem(skuId);
        model.addAttribute("cartItem", item);
        return "success";
    }

}
